Central vertical grounding leading-down method for composite pole tower and pole tower thereof

Abstract

The invention relates to a central vertical grounding leading-down method for a composite pole tower and the pole tower thereof. An earth wire cross arm is made of metal material, a grounded leading-down wire is led out of the center of the earth wire cross arm, and the grounded leading-down wire is vertically led down from the right center of the composite pole tower and connected to the ground; and if the lower part of a tower body is provided with a steel pipe, the grounded leading-down wire can be directly connected on the steel pipe and grounded. By using the insulating strength of the tower wall of the composite pole tower, the lightning surge resistant insulating strength of a circuit is enhanced, the grounded leading-down wire is prevented from being short-circuited with the tower body of the composite pole tower, and the insulating effect of the composite tower body is exerted; and because the grounded leading-down wire passes through the inner side of the pole tower, the grounded leading-down wire exposed outside is prevented from being damaged by external force such as strong wind and the like, the pole tower has a simple structure, and the method is easy to implement.

Description

technical field [0001] The invention relates to a method for vertically directing down the center of a composite material pole tower and the pole tower thereof, and belongs to the application field of power transmission technology in electric power systems. Background technique [0002] The tower is an important equipment of the transmission line, and the characteristics of the materials used directly affect the safety, economy and reliability of the line operation. Because steel has the advantages of high strength-to-weight ratio, easy processing and installation, most steel towers are currently used at home and abroad. However, the all-steel tower also has defects such as high quality (higher steel density) and easy corrosion, so it requires a lot of manpower and material resources in the construction, transportation and maintenance of the tower. With the development of composite material production technology and its manufacturing process, composite materials have the ch...

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Problems solved by technology

[0006] Therefore, the application of composite material towers for transmission lines has the problem of grounding down (because the tower body of the all-steel tower is a metal conductor, the ground wire is naturally directly connected to the earth through the tower body, so there is no problem of grounding down). There are many different methods of grounding down. The grounding down method will directly affect the lightning protection effect of composite material towers, and also affect the antifouling of lines and reduce the width of transmission corridors. Therefore, the grounding down of composite material towers The method is the key technology and difficulty that needs to be solved first in its application

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